Performance of three resistive MPGDs with pad readout coupled to VMM3a ASIC

We present a comparative study, conducted under identical conditions, of three resistive Micro-Pattern Gaseous Detector (MPGD) technologies — Micromegas, RPWELL, and μ-RWELL — using a common VMM3a-based readout system. Prototypes of identical dimensions and 1 cm² pad segmentation were tested using relativistic muons and pions. All detectors demonstrated stable operation with efficiencies exceeding 96%. We report on the measured charge and time response of the three detectors in view of their different amplification properties, signal shapes and rise times. Continuous readout enabled characterization of electrical instabilities during and between beam spills at near-breakdown voltages. Rate capability was assessed in a high-intensity pion beam. The presented results highlight the distinct operational advantages of each detector technology for moderate-precision tracking applications in moderate- to high-rate environments.